function updatePrices() {
  var numPagesEl = document.getElementById('numPages');
  var totSetupEl = document.getElementById('totSetup');
  var totPagesEl = document.getElementById('totPages');
  var totalEl = document.getElementById('total');

  var costSetup = 1400;
  var costPage = 165;

  numPagesEl.value = Math.round(numPagesEl.value);
  totSetupEl.value = costSetup;
  totPagesEl.value = numPagesEl.value * costPage;
  totalEl.value = parseInt(totSetupEl.value) + parseInt(totPagesEl.value);
}